Question

Read the following statements.
1. Carbon, hydrogen, oxygen and nitrogen are micronutrients
2. Potassium and chlorine are macronutrients and help in maintaining anion-cation balance in cells
3. Some plants growing near nuclear test sites take up radioactive strontium
4. Potassium can alter the osmotic potential of a cell
How many of the above statements are correct?

• A. One
• B. Two
• C. Three
• D. Four

Answer 1

The correct option is B Two

Carbon, hydrogen, oxygen and nitrogen are not micronutrients. They are macronutrients and are required in large amounts by the plant.
Potassium and chlorine help in maintaining anion-cation balance in cells. But chlorine is a micronutrient.
Plants growing near nuclear test sites do take up radioactive strontium.
Potassium can alter the osmotic potential of a cell and this helps in the opening and closing of stomata.
Hence, only two statements are correct (3 and 4).